Hi, This is not necessarily an embedded question, so please direct me to a different forum dealing with Linux Network programming if none here can help me.
I have 4 100baseT interfaces on my MCP750, each configured for a different 192.168.x subnet. sh-2.03# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.3.0 * 255.255.255.0 U 0 0 0 eth3 192.168.2.0 * 255.255.255.0 U 0 0 0 eth2 192.168.1.0 * 255.255.255.0 U 0 0 0 eth1 192.168.0.0 * 255.255.255.0 U 0 0 0 eth0 sh-2.03# I am trying to send a broadcast message (as rudimentary synchronization) to all subnets at the same time. I believe this is called "All-subnets-directed Broadcast" [from Stevens], and should be possible if the application and router supports this. To test this I use ping 192.168.255.255 but receives "Network is unreachable" error: sh-2.03# ping -c 1 192.168.255.255 PING 192.168.255.255 (192.168.255.255): 56 data bytes ping: sendto: Network is unreachable ping: wrote 192.168.255.255 64 chars, ret=-1 --- 192.168.255.255 ping statistics --- 1 packets transmitted, 0 packets received, 100% packet loss sh-2.03# I have also tried ping 192.169.255.0 and ping 255.255.255.255 with same results. Ping 192.168.x.255 works for broadcasting on each of the subnets, is called "Subnet-directed Broadcast" [from Stevens]. I'm sure it must be possible to broadcast to all configured subnets somehow. Does the problem lie with the router or ping. (Maybe I should stop being lazy and go write a small tester to check it out :-) Any suggestions in the mean time? _______________________________________________________________________ Manie Steyn Embedded Software Engineer mailto:msteyn at wmux.com Western Multiplex, 1367 Redwood Way, Petaluma, CA Ph:707 792 5390 x 12 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
